US2839018A

US2839018A - Sewing machine attachment

Info

Publication number: US2839018A
Application number: US613302A
Authority: US
Inventors: Troy F Mulkey
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-10-01
Filing date: 1956-10-01
Publication date: 1958-06-17
Anticipated expiration: 1975-06-17

Description

, June 17, 1958 T. F. MULKEY SEWING MACHINE ATTACHMENT Filed Oct. 1, 1956 ll J H n. wIIIIIIIIIIIIIIIIIIIIAv.

INVENTOR. 770y Ff Mu BY ,7)

May

A TTORMFK nited States Patent Ofiice 2,839,018 I Patented June 17, 1958 2,839,018 SEWING MACHINE ATTACHMENT Troy F. Mulkey; Independence, M0. Application October 1956, S'e'rial'No. 613,302

1 Claim. (Cl.'112'-'-139) This invention relates to a sewing machine attachment specially adapted for laying a cord along the seams of upholstery or the like, the primary object being to facilitate carrying out such operation with a minimum amount of time and effort and to present a strong, neat appearing joind'er between the panels to which the said cord is secured.

it has heretofore been the practice in production of seat covers and the like to employ a number of stitching steps in order to sew a cord in place with respect to the marginal edges of a pair of panels. The operator would be required to first fold a binding strip over the cord and secure the same in place by a first line of stitching along the cord in interconnecting relationship to the overlapping marginal edges of the binding strip. Thereupon, the binding strip is conventionally secured to one of the panels by a second line of stitching and finally, a third line of stitching would become necessary to attach the binding strip to the other of the said panels.

Manifestly, such method is time consuming and does not necessarily result in a stronger or neater appearing finished article. Therefore, it is the most important object of the instant invention to provide a method which eliminates all but one of the lines of stitching and which method may be carried out through employment of a novel attachment for a conventional sewing machine.

Another important object of the present invention is to provide an attachment that includes as a part thereof a binder in the nature of a loop for holding the binding strip in folded relationship to the cord as the binding strip is stitched in place to a pair of panels therebetween.

Another important object of the instant invention is to provide an attachment that includes a presser foot or the like for holding the cord firmly in place within the fold of the binding strip as the strip and the panels are fed simultaneously through the stitching mechanism of the sewing machine.

A still further object of the instant invention is to provide in the aforementioned attachment means for positively and accurately guiding the panels as the same are fed with the bin-ding strip and the cord in the manner above indicated.

In the drawing:

Figure 1 is a perspective view of a sewing machine attachment made pursuant to the present invention.

Fig. 2 is an enlarged plan view of the attachment entErely removed from the sewing machine.

Fig. 3 is an edge elevational view of the attachment.

Fig. 4 is a cross-sectional view taken on line 1V-IV of Fig. 2.

Fig. 5 is a cross-sectional view taken on line V-V of Fig. 3; and

Fig. 6 is a fragmentar, cross-sectional view taken through the finished article produced through use of the attachment in the manner illustrated by Figure l.

The attachment illustrated in the drawing and to which the instant invention relates, is broady designated by the numeral 10 and is employed in connection with a 2 conventional sewing machine broadly designated by the numeral 12. As initially indicated hereinabove, attachment 10 isdesignated to facilitate laying of a cord 14 within a binding strip 16 that is in turn connectednto a pair of

panels

18 and 20 therebetween by a single line of stitching 22.

The attachment 10 per se includes a suitable support which may be in the nature of a block 24 provided with one or more openings 26, permitting attachment directly to bed 28 of machine 12 through use of suitable fasteners 30, next adjacent stitching mechanism 32 of themachine 12.

One edge 34 of the block 24 serves as a guide for panel 18 when the attachment is placed in use and a hook 36; on the upper faced the block 24 guides the panel 20, functioning additionally to limit the extent of upward movement of the panel 26.

-.A-binder 38 inthe nature of a loop is adapted to receive the 'strip 16 and is preferably formed as an ire tegral part of a plate 40 secured to the lowermost face of block-24. Loop 38 is dispsed between the marginal ,edgesof the panels 18 and 20- in the manner shown in Figure 1 whenthe-attachment 16* is placed, in use. Prior to insertion-of thebin'd-ing strip 16 into the-loop 38 and into a second loop 42, the strip 16 is folded about the cord 14 and to the end that the latter is held firmly within the fold of strip 16, plate 40 is provided with an L-shaped finger or presser foot 44 extending across the loop 38 at the mouth thereof.

It is seen in Fig. 3 that the foot 44 presents a pair of spaced-

apart slots

46 and 48 that receive the marginal edges of the folded strip 16 as the foot 44 prevents displacement of the cord 14. The distance between the slots 46 and 43 and, therefore, the width of the foot 44, should be substantially the same as the diameter of .the cord 14. Similarly, the terminal end of the foot 44 should be spaced from the bight of loop 33 and the maximum diameter of the elongated loop 38 should be such as to provide freedom of sliding movement of the edges of the strip 16 along the bottoms of the slots 46 and S3.

Loop 42 is aligned with the loop 38 and disposed between the edge 34 of block 24 and guide hook 36. its size, shape and configuration is essentially the same as that of loop 38, but in practice it has been found that it is unnecessary to duplicate the cord holding means 44 in the loop 42.

It is apparent from the foregoing that when the attachment 10 is placed in use, the

panels

18 and 20, the cord 14 and the strip 16, are fed simultaneously to the stitching mechanism 32 in order to interconnect the

panels

18 and 20 with the strip 16 by the single line of stitching 22. It is but necessary to initially fold the strip 16 about the cord 14 and to insert the same into

loops

36 and 42 to start the operation. Thereupon

panels

18 and 20 are positioned properly above and below the folded strip 16 in a position for guiding along the edge 34 and along the hook 36 respectively. Manifestly, the block 24 is positioned properly on the table 28 with respect to the stitching mechanism 32 to the end that when the parts to be thus assembled are fed along the attachment 10, the line of stitching 22 is formed next adjacent the cord 14, thereby confining the same in place within the strip 16 along its line of fold.

The finished article appears substantially as shown in Fig. 6 of the drawing in transverse, cross-section when the

panels

18 and 20 are separated exposing the fold of the strip 16 along the outer surface of

panels

18 and 20. The edges of the

panels

18 and 20, as well as the two edges of the folded strip 16, will be in contiguous relationship because of the fact that panel 18 is guided by edge 34, panel 20 is guided by the hook 36, and the edges of the strip 16 are guided by the inner ends of

notches

46 and 48, all of which are in alignment. Within the loop 42 the edges of the strip 16 are guided by that portion of edge 34 designated by the numeral 34a in Fig. 4 of the drawing. The edge 34a is likewise aligned vertically with the edge 34.

It is apparent from the foregoing that after the strip 16 is initially threaded into the loop 38 with its marginal edges extending into the slots 46 and'48 in engagement with the bottoms of slots 46-48 and with the cord 14 disposed within the fold of the strip 16, the binder 38, cooperating with the foot 44 and notches 46-48, will automatically fold the strip 16 about the cord 14 and the same are fed continuously through the

loops

38 and 42 and with respect to the stitching mechanism 32.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

A sewing machine attachment usable therewith in sewing a cord in place Within a binding strip and joining the strip to a pair of panels therebetween with a single line of stitching, said attachment including a mounting block provided with a front, vertical, elongated guide edge and adapted to be mounted on the machine adjacent the stitching mechanism; a plate secured to and extending laterally from the block; a binder on the plate for receiving the strip and said cord and holding the strip l folded about the cord as the same are fed toward said stitching mechanism, said binder including a first loop integral with and extending forwardly from the plate beyond said front edge of the block for receiving the folded strip, the axis of said loop being substantially parallel with said edge of the block and a finger integral with the plate, extending into said first loop and adapted to engage the cord for pressing the latter into the fold of the strip; a second loop on the block, extending forwardly from said guide edge and disposed in coaxial alignment with said first loop for receiving said folded strip, said vertical edge on the block being disposed for engagement by one longitudinal edge of the lowermost of said panels; and a hook element on the block and extending forwardly from the upper margin of said vertical edge thereof for engagement by one longitudinal edge of the uppermost panel and adapted to partially overlap the same.

References Cited in the file of this patent UNITED STATES PATENTS 272,847 Bea Feb. 27, 1883 273,915 Turner Mar. 13, 1883 320,043 Brigham June 16, 1885 1,444,894 Winkelmann Feb. 13, 1923 2,542,212 Schaad Feb. 20, 1951